Google Fi launches "super network" for automatic carrier switching and Wi-Fi Auto-Connect+ to improve indoor connectivity in places like malls and airports (Sam Rutherford/Engadget)

Google Fi is introducing an update today that brings back network switching with the help of a "secondary" partner, expanding the reach of W+ networks and adding AI-powered assistance. Project Fi initially offered users access to both T-Mobile and Sprint networks; however, the second partner was later dropped, leaving only one major network.

Now, Google Fi is reintroducing a second network as part of their "super network" concept. Users will primarily be on the "Primary network," but the system will automatically switch to the "Secondary network" if conditions warrant it, using smart thresholds for this decision-making. Currently, there is no manual switching process.

Ultra Wideband (UWB) support is a key feature of this new network setup. Google hasn't disclosed which company will be the second partner, but they confirmed it will be one of America’s fastest 5G networks. The primary network ensures that users have top priority, and data will never be deprioritized. The backup network, on the other hand, offers the highest QCI (Quality of Service Index) priority, ensuring that subscribers are among the last to experience slowdowns during congestion.

This feature is available internationally when local partner networks are present, particularly for users with Flexible and Unlimited Premium plans.

Pixel 9 and newer devices equipped with Google Fi eSIM will be the first to support network switching, utilizing Android's Multiple Enabled Profiles (MEP) eSIM technology. This technology allows for two carrier profiles to be stored on a single chip. The Google Fi app now includes a "Your super network" card in the Home tab, indicating whether you're connected to the Primary or Secondary network, and provides options to view your switching history and the last occurrence. Users will also be notified if they are within range of W+ networks.

In addition to these changes, Google Fi is expanding Wi-Fi Auto Connect+ beyond Pixel phones to select Samsung Galaxy (S23, Fold/Flip 5, and newer) and modern Motorola devices. These premium Wi-Fi networks, available in millions of locations like airports, malls, stores, and restaurants, connect automatically via the Google Fi Virtual Carrier Network, which encrypts data.

The latest update introduces "Ask Fi," an AI-powered chat assistant designed to quickly provide answers and guided troubleshooting for common issues. Users can request human support with seamless context transfer, ensuring a smooth user experience. These updates are expected to roll out starting today, with network switching gradually becoming available.